Spring buffer



SPRING BUFFER Eiledhug, .9, 1938 IN VEN TOR.

bkouuici.

Pate'nted Nov. I9, 1940 TEN OFFIQE SPRING BUFFER Applioation August 19, 1938, SerialNo 225,702

4 Claims.

'Ihis invention pertains to mine cars and specifically to spring buffers for said cars and has f0r an object the provision of means resiliently cushioning the bufiing and draft shocks imposed upon I:he car through the buffer.

In the drawing forming part of this specification, of Which Fig. 1 shows in plan the bufier 0 f the invention assembled on a car and Figs. 2 to 4= inclusive sho-w sections taken on the lines 22, 3-3 and 4 3 respectively of Fig. l, reference character I indicates a portion of a mine car having a floor sheet 2 and longitudinally extending sills 3. 'Ihe bufler comprises a housing 4 which is rigidly secured the fioor and sills of the car and extends outwardly therefrom, and a bung block 5 mounted upon the housing and movable relative thereto longitudinally of the car toabsorb bufling and draft shocks.

The bufier housing I comprises an end wall 6 extending upwardly from the plane of the fioor 2 of the car and provided Wii;h rearwardly extending side flanges I having apertures therein to receive suitable fastening means for securing the housing to the sills 3.

Adj acent the base of the Wall 3 and extending between the flanges I is a flange 8 having suitable apertures therein for the reception of fastening means 130 secure this flange to' the fioor 2 of the car. Extending outwardly frcm t he Wall 6 and away from the car on opposite sides: of the longitudinal medial line through the carare spring housings comprising side Walls 9 and. I0 and an end closing Wall I I.

Connecting the spring housings and extending across the top thereof is a top Wall I2 extending 130 the b-uffer housing Wall 6 and connected therewith. Between the spring housings the Wall I2 is o1fset to permit the movement of the coupling pin as hereinafter described.

At least between the spring housings a bottom Wall I3 on the bufi?er honsing I extends 011i;- wardly from the housing end wall 6, which bottom wall I3 is suitably shortened to permit movement of the coupling pin as hereinafter described.

are substantially triangular fianges I5.

In the top Wall I2 of the spring housings are suitable apertures I6 extending from the abutment walls I4 to adjacent the and Walls II of the spring housing.

Disposed Within each spring housing is a compression spring 32 having a spring cap ab each end, one spring cap I'I being disposed. against the Walls IQ and the other spring cap I8 disposed against the wall II. These springs and caps are inserted through the bottom opening in the spring housing and each spring is preferably under an initial compression sufficient to rs-Isain be spring and caps Within the housing. T0 assist in retention of the re ar spring cap i1; is supported upon the flanges I5.

The bufier block comprises a front face I9, a top all 20, and a bottom Wall 2I, with counecting sicle- Walls 2,2. The side Walls being spaced apart a greater distance than the Walls II) cf the spring housings and these walls II! are preferably provided With outwardly -extending bearing portions 23 lying adjacent the side Walls so as 130 position -the bufling block in a direction transversely of the car. The top and bottom Walls of the buffer enclose the top and bottom Walls cf the housing II which latter Walls along With the spring housings provide a support for the buffimg block.

AI; the longitudinal medial line through the car and extending on opposite sides thereof above the top Wall 20 of the bufling block is a coupling link housing comprising vertically disposed sicle and end Wall 24 and a connecting top Wall 25 in spaced. relation to th e wa1l 20. The coupling link housing top Wall and. top and bottom walls of the buffing block are provided. With suitably aligned apertures 26 for reception of a coupling pin 2'I and the front -face I9 of the buffing block has a suitable aperture 28 therein for reception of a coupling link to be engaged by thi s coupling pin 2'I. Spaced on opposite sides of the longitudinal medial line through the car are spring cap bearing members 30 on the inner face of the front wall I9 and extending toward the car, the Walls II of the spring housings and the adjacent spring cap I8 having suitably aligned apertures therein for reception of these spring cap bearings. II: is to be noted. that the aparture in the Wall II is larger than the aperture in the adjacent spring cap and the spring cap bearing on the buffer block is suitably shaped so that it may move freely within the aperture of I;he Wall II and be-ar against the adjacent spring cap. T0 secure the bufiing block and buffer housing in assembled relation the top and 55 bottom walls of the buifer block have suitably shapecl aperturesfor reception of a bearing pin 29 which is disposed behind the rear spring cap in each spring housing and. between the spaced Walls I4 of the housing.

Referring now to Figs. 1 and 2 of the drawing, it will be obvious that When builing shocks are applied to the car they are takten up by the buffing block Whichmoves inwardly cf the car causing spring cap bearing members 30 to move the associated spring caps I8 inwardly of the spring housings compressing the springs 32 between the spring caps since the inner spring caps bear against the Wall I4 of the housings and cannot move inwardly towarcls the car. When draft shocks are appliecl the car, tending to pull the buffer block away from the car the bearing pins 29 bearing against the inner spring caps l! compress the spring against the Walls l I cf the spring housings.

Having thus describeol the invention what I claim as now ancl desire to secure by Letters Patent is:

1. In a mine car bufler, in combination, horizontally spaced housing members each comprising spacecl Walls connected at one end by an end Wall and having adjacent the other end of the spaced Walls spacecl apart opposing abutments, a member connecting said housings and extending between anal across the free ends cf said other encls cf said housing Walls, a compression spring Within each housing, bearing members at; opposite ends cf each spring engaging said abutments and saiol end. Wall respectively, a bufiing block including a front face disposed. across said spring housing end Walls anol top, bottom anal side Walls enclosing said spring housings, apertures in said housing end walls, abutments on the inner surface of said buffer block front face anti registering within said housing end Wall apertures, aligned apertures in said buifer block top and bottom Walls at said spring housing abutments, anti a removable member therein engaging a face of the adjacent spring bearing member.

2. In a mine car buffer, in combination, a. lauffing block having a buifing face and rearwardly extending top anal bottom Walls, a, spring housing and buifing block supporting member comprising a base portion for attachment to the mine cir and spaced spring housings extending between said buffing block walls to adjacent the said bufiing face thereof, each spring housing having upwardly disposed longitudinally spaced apertured Walls, a compression spring Within each spring housing and between saicl apertured Walls, ahntments 0n the bufiing block adjacent to and outwardly cf each said apertured wall, said bufifing block abutments moving through said spring housing wall apertures 130 compress the contained springs as the bufiing block moves in absorbing buffing and dra.ft shocks.

3. In a mine car bufier, in combination, a. car end sil1 member including outwardly extending horizontally spaced spring housings, each housing including spring abutments spaced longitudinally of the car anti outwardly cf said end sill member a compression spring within each housing and between said abutments a draft anti buffing block including a buffing face and rearwardly extending top anti bottom Walls enclosing ancl supported 011 said spring housings, saiol bufiing block top and bottom walls extending rearwardly of the rearmost spring abutment of said spring housings, means on said bufiing face compressing seid springs to absorb buffing shocks, and

removable means supportecl by saicl buffing block top and bottorn Walls rearwardly of said springs for compressing said springs to absorb draft shock imposed on the bufling block.

4. In a mine car buffer, in combination, a, spring housing and bufiing block supporting rnember, a buffing block mounted exteriorly of seid supporting mernber, spring units supported in said spring housings independently of said bufiing block, fixcd spaced independent spring unit engaging portions an said buffing block disposed at opposite ends of ea.ch of said spring units and movable relative to said supporting member for alternately and independently engaging opposite ends of said spring units Whilst moving relative to saicl supporting housing under draft and buffing shocks, one cf seid spring engaging portions being detachable from said buffing block to permit assembly cf the buffer.

HAROLD E. ABKOWITZ. 

